diff --git a/app/models/user.rb b/app/models/user.rb
index 4ca70b3f5..48dd9f08f 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,5 +1,5 @@
 class User < ApplicationRecord
   include GDS::SSO::User
 
-  serialize :permissions, Array
+  serialize :permissions, type: Array
 end
diff --git a/db/migrate/20130110143712_change_user_permissions_to_array.rb b/db/migrate/20130110143712_change_user_permissions_to_array.rb
index 0948415f7..722c680ee 100644
--- a/db/migrate/20130110143712_change_user_permissions_to_array.rb
+++ b/db/migrate/20130110143712_change_user_permissions_to_array.rb
@@ -1,6 +1,6 @@
 class ChangeUserPermissionsToArray < ActiveRecord::Migration
   class User < ApplicationRecord
-    serialize :permissions
+    serialize :permissions, type: Array
   end
 
   def up